4 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. */
9 const Float_t thetaOpen2 = 0.8*kDegrad;
11 const Float_t thetaOpen3 = 0.9*kDegrad;
12 // angle of beam tube in second cone
13 const Float_t thetaOpenB = 0.74*kDegrad;
14 // inner lead Cone opening angle
15 const Float_t thetaOpenPb = 0.6*kDegrad;
16 // Outer Pb Cone opening angle
17 const Float_t thetaOpenPbO = 1.6*kDegrad;
19 const Float_t zPb = 810.;
20 // y-position of trigger wall
21 const Float_t zFilterIn = 1471.;
22 const Float_t zFilterOut = zFilterIn+120.;
23 // end of 2-degree outer cone
24 const Float_t zConeE = 30./TMath::Tan(accMin);
28 const Float_t dInsuS=0.9;
29 const Float_t dEnveS=0.1;
30 const Float_t dProtS=0.2;
31 const Float_t dFreeS=0.5;
33 Float_t dVacuS=dTubeS+dInsuS+dEnveS+dProtS+dFreeS;
36 // Radii and z-positions imposed by vacuum chamber layout
39 // delta_R for bellows
40 const Float_t dr11=1.8;
42 const Float_t dr12=0.875;
43 // delta_R to catch up with cone
44 const Float_t dr13=0.525;
46 const Float_t dF1=2.*3.9;
48 const Float_t dB1=18.482-dF1/2-dr11;
50 const Float_t zvac2=518.;
51 const Float_t zvac1=zvac2-dF1/2-dB1-dr11-dr12;
52 const Float_t zvac3=zvac2+dF1/2+dB1+dr12+dr13;
53 const Float_t zvac4=558.;
54 // Outer shield dimensions
55 const Float_t R11=15.45;
57 const Float_t dRSteel1=2.;
58 const Float_t dRSteel2=4.;
59 // According to design
60 // const Float_t R21=20.3;
61 // to avoid overlap with 2deg line
62 const Float_t R21=19.4;
66 const Float_t zvac5=zvac4+4.;
70 const Float_t zvac6=711.;
71 const Float_t zvac8=1274.;
72 const Float_t dr21=2.263;
73 const Float_t dr22=1.3;
74 const Float_t dr23=2.263;
75 const Float_t dB2=24.118;
76 const Float_t dF2=10.6;
77 const Float_t zvac7=zvac8-dF2/2-dB2-dr22-dr21;
78 const Float_t zvac9=zvac8+dF2/2+dB2+dr22+dr23;
82 const Float_t zvac10=1466.;
83 const Float_t zvac11=1800.;
84 const Float_t zvac12=1900.;
86 const Float_t R41=35.;
87 const Float_t R42=50.;
88 const Float_t R43=110.;
96 const Float_t rB1=5.5;
97 const Float_t hB1=2.25;
98 const Float_t lB1=0.77;
99 const Float_t eB1=0.04;
103 const Float_t rF1=8.5;
104 const Float_t dFlange=0.1;
109 const Float_t rB2=15.35;
110 const Float_t hB2=2.25;
111 const Float_t lB2=2.32;
112 const Float_t eB2=0.05;
116 const Float_t rF2=18.8;
121 const Float_t dzch=10.;
122 const Float_t zch1=532.5;
123 const Float_t zch2=690.;